Merge develop into main (#338)

### Cardputer:
- Fix keyboard issue with up/down button conflict when selecting switch
- Fix backlight flickering

### UI improvements
- Removed a 3 pixel border that went around the entire desktop environment
- Improved system layout (GuiService)
- Statusbar: improved layout (mainly margin/padding)
- Toolbar: fixed margin/padding of all buttons, fixed alignment of all content
- Improved layout/UI of many apps

### Other
- Update LVGL to 9.3.0 official release (was dev version)

Boards/M5stackCardputer/Source/InitBoot.cpp

@@ -6,5 +6,5 @@ constexpr auto* TAG = "Cardputer";
 bool initBoot() {
     TT_LOG_I(TAG, "initBoot");
 
-    return driver::pwmbacklight::init(GPIO_NUM_38, 256);
+    return driver::pwmbacklight::init(GPIO_NUM_38, 512);
 }